21210011001212 has 12 divisors (see below), whose sum is σ = 40491839184216. Its totient is φ = 9640914091440.

The previous prime is 21210011001203. The next prime is 21210011001251.

21210011001212 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241022852243 + ... + 241022852330.

It is an arithmetic number, because the mean of its divisors is an integer number (3374319932018).

Almost surely, 2^{21210011001212} is an apocalyptic number.

21210011001212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21210011001212 is a deficient number, since it is larger than the sum of its proper divisors (19281828183004).

21210011001212 is a wasteful number, since it uses less digits than its factorization.

21210011001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482045704588 (or 482045704586 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

It can be divided in two parts, 2121001 and 1001212, that added together give a palindrome (3122213).

The spelling of 21210011001212 in words is "twenty-one trillion, two hundred ten billion, eleven million, one thousand, two hundred twelve".